Airflow direction control device of air-conditioning indoor unit

Abstract

An air-conditioning indoor unit includes a blow-out port, a Coanda vane and a controller. The Coanda vane is-provided in proximity to the blow-out port. The Coanda vane turns the blown air into a Coanda airflow along a bottom surface of the Coanda vane. The controller performs a control in which a direction of the Coanda airflow is directed in a first direction by positioning the Coanda vane in a first orientation, and the direction of the Coanda airflow is directed in a second direction different from the first direction by positioning the Coanda vane in a second orientation different from the first orientation.

What is claimed is: 
     
       1. An airflow direction control device of an air-conditioning indoor unit capable of causing a flow of blown air blown out from a blow-out port to be diverted in a predetermined direction due to the Coanda effect, the airflow direction control device of the air-conditioning indoor unit comprising:
 a positionable Coanda vane provided in proximity to the blow-out port, the Coanda vane being arranged and configured to turn the blown air into a Coanda airflow along a bottom surface thereof due to the Coanda effect; 
 a movable airflow direction adjustment vane arranged and configured to vary a vertical direction of the blown air, the airflow direction adjustment vane being positioned at a bottom of die blowout port such that airflow only flows on an upper side of the airflow direction adjustment vane; 
 a first driving unit configured to drive the Coanda vane; 
 a second driving unit configured to drive the airflow direction adjustment vane; and 
 a controller configured to perform a control in which
 a direction of the Coanda airflow is directed in a first direction by positioning the Coanda vane in a first orientation by controlling the first driving unit, 
 the direction of the Coanda airflow is directed in a second direction different orientation different from the first orientation by further controlling the first driving unit, and 
 an orientation of the airflow direction adjustment vane varies with the first orientation and the second orientation of the Coanda vane by controlling the second driving unit. 
 
 
     
     
       2. The airflow direction control device of the air-conditioning indoor unit according to  claim 1 , further comprising
 a remote control configured to remotely operate the controller to control the direction of the Coanda airflow, 
 the orientation of the Coanda vane being selected by the remote control. 
 
     
     
       3. The airflow direction control device of the air-conditioning indoor unit according to  claim 2 , wherein
 the remote control has a size input menu usable to input a size of an air conditioning target space; and 
 the controller is configured to select the orientation of the Coanda vane based on the size of the air conditioning target space when the size of the air conditioning target space is inputted via the size input menu. 
 
     
     
       4. The airflow direction control device of the air-conditioning indoor unit according to  claim 2 , wherein
 the remote control has a distance input menu usable to input an opposing distance from the blow-out port to an opposite wall forward from the blow-out port, and 
 the controller is configured to determine the orientation of the Coanda vane based on the opposing distance when the opposing distance is inputted via the distance input menu. 
 
     
     
       5. The airflow direction control device of the air-conditioning indoor unit according to  claim 1 , further comprising
 a distance sensor arranged and configured to measure a distance from the blow-out port to an opposite wall forward from the blow-out port, 
 the controller is configured to determine the orientation of the Coanda vane based on a value measured by the distance sensor. 
 
     
     
       6. The airflow direction control device of the air-conditioning indoor unit according to  claim 1 , wherein
 the Coanda vane is positionable in plural orientations including at least a ceiling-blowing orientation in which the Coanda airflow is turned to the ceiling; and 
 the controller is configured to adjust at least one of
 an orientation of the airflow direction adjustment vane and 
 the orientation of the Coanda vane in the ceiling-blowing orientation in order to regularly vary a position of the Coanda airflow. 
 
 
     
     
       7. The airflow direction control device of the air-conditioning indoor unit according to  claim 1 , further comprising
 a remote control configured to remotely operate the controller to control the direction of the Coanda airflow, 
 the orientation of the Coanda vane being selected by the remote control. 
 
     
     
       8. The airflow direction control device of the air-conditioning indoor unit according to  claim 7 , wherein
 the remote control has a size input menu usable to input a size of an air conditioning target space, and 
 the controller is configured to select the orientation of the Coanda vane based on the size of the air conditioning target space when the size of the air conditioning target space is inputted via the size input menu. 
 
     
     
       9. The airflow direction control device of the air-conditioning indoor unit according to  claim 7 , wherein
 the remote control has a distance input menu usable to input an opposing distance from the blow-out port to an opposite wall forward from the blow-out port; and 
 the controller is configured to determine the orientation of the Coanda vane based on the opposing distance when the opposing distance is inputted via the distance input menu. 
 
     
     
       10. The airflow direction control device of the air-conditioning indoor unit according to  claim 1 , further comprising
 a distance sensor arranged and configured to measure a distance from the blow-out port to an opposite wall forward from the blow-out port, 
 the controller is configured to determine the orientation of the Coanda vane based on a value measured by the distance sensor. 
 
     
     
       11. An air-conditioning indoor unit including the airflow direction control device according to  claim 1 .